Vanadium‐Modified Bimetallic Phillips Catalyst With High Branching Ability for Ethylene Polymerization
Vanadium‐Modified Bimetallic Phillips Catalyst With High Branching Ability for Ethylene Polymerization
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DOI：
10.1002/mren.201200015
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发表时间：
2012-08
影响因子：
1.5
通讯作者：
A. Matta;Yanning Zeng;Toshiaki Taniike;M. Terano
中科院分区：
文献类型：
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作者：
A. Matta;Yanning Zeng;Toshiaki Taniike;M. Terano
为了提高乙烯聚合菲利普斯催化剂的支化能力，开发了一种新型的支化菲利普斯催化剂。本工作通过改变浸渍溶液的pH值、钒负载量和钒前体，通过共浸渍制备了一系列钒改性的菲利普斯催化剂。提出了一种制备具有良好催化性能的双菲利普斯催化剂的方法。通过漫反射UV-维斯和X射线光电子能谱对催化剂进行表征，阐明了铬和钒组分之间的特定相互作用对于提高支化能力和催化剂活性的关键作用。
In order to improve the branching ability of Phillips catalyst for ethylene polymerization, a new bimetallic Phillips catalyst was developed. In this work, a series of vanadium‐modified Phillips catalyst were prepared through co‐impregnation by varying the pH of the impregnation solution, the vanadium loading and the vanadium precursors. A method to prepare bimetallic Phillips catalyst having good catalytic performance was proposed. Catalyst characterization by diffuse reflectance UV‐Vis and X‐ray photoelectron spectroscopies clarified the key role of specific interaction between chromium and vanadium components for the improvements in branching ability and catalyst activity.